So I've been thinking lately about what physics is really about. Isn't it true that at the end of the day physics is just a logical construction for us to understand the material world? Nobody has ever litterly 'seen' enities like energy, charge, electrons or even time and space. Simply becouse they do not really exist in the material world. These are properties of the human interpretarion of the world we live in. Or do the entities of physics really actualy exist in nature? Meaning that there is ACTUALY energy floating around everywhere this room but we just can't see it. If this is really so then science just took some sort of a right guess postulating it's existence. If we look at modern QM we see that sometimes we accept this view. But then isn't is true that really ALL of physics is a logical construction? Does any of you think it is wrong for scientists to accept such an anti-realistic view?